SLACspeak Legacy (NON-CURRENT terms)
Glossary of *NON-CURRENT* SLAC-related abbreviations, acronyms,
initialisms, terms and lingo useful for research into SLAC history
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2NS VENUS detector at KEK-TRISTAN.
5045s Klystrons used to power the SLAC linac, so called because they produce 50MW peak power and 45MW average power.
8-Pack Project NLC R&D project to construct an operating special power source using a solid state induction modulator power two 75 MW X-band klystrons,
with a SLEDII pulse compression system.
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AA Antiproton Accumulator. (CERN)
AAO Affirmative Action Office.
AAP American Association of Publishers. Often used in the context of SGML as the AAP DTD
AAR Association of American Railroads.
AATF Affirmative Action Task Force
AATF Advanced Accelerator Task Force HIST
ABRT ABoRT.
ABS Atomic Beam Source.
AC Antiproton Collector (CERN)
Accelerator Department Safety Office See ADSO.
Accelerator Improvements See AI.
Accelerator Maintenance East See AME.
Accelerator Maintenance RF Systems See AMRF.
Accelerator Maintenance Special Systems See AMSS.
Accelerator Maintenance West See AMW.
Accelerator Physics Expert See APE.
ACCM ACCMOR Collaboration.
ACCS ACCelerator Status. A database primary.
ACD Advanced Computations Department. (SLAC)
ACDA American Commodity Distribution Association
Achromat The concrete girders, or cells, in the SLC arcs are called 'achromats'
because their magnetic optics are designed to be achromatic. A beam line is called achromatic when its
beam transport characteristics do not change momentum. For convenience of construction and operation,
the arcs are divided into 23 subsections, each made up of 20 magnets. Each subsection is called an achromat.
ACI American Competitiveness Initiative.
ACL Access Control List
ACME Advanced Cosmic Microwave Explorer
ACT Atmospheric Cerenkov Telescope.
AD Accelerator Department.
AD Antiproton Decelerator (CERN)
AD&I Accelerator Design & Integration. (ILC)
AD2 Antiproton Decelerator (CERN)
ADA Anello Di Accumulazione. Italian half-meter diameter positron- electron asymmetric ring. Built in 1961.
ADC Analog to Digital Converter.
ADCC See ADCOC. COMPUTING
ADCOC Associate Directors' Committee on Computing.
ADCP Pointer to ADC location in buffer. (%ADC n + CH m) where n is the ADC number o ...M is the channel number. A magnet VAX database secondary.
ADONE Italian 1.5 GeV electron-positron collider. In operation 1969-1993 (Frascati)
ADP Automated Data Processing
ADS Anti-De Sitter
AE Architect / Engineer.
AEC Atomic Energy Commission. Superseded by the Energy Research and Development Agency (ERDA), which in turn was superseded by the Department of Energy (DOE).
Established 1 August 1948, superseded 11 October 1974. GOV
AECM Architectural Engineering Construction Management.
AEMCBP Advances in Experimental Methods for Colliding Beam Physics.
AEMS Argonne Effective Mass Spectrometer.
AES Advanced Engineering Staff (General Motors).
AES Advanced Energy Systems.
AFRD Accelerator and Fusion Research Division (Lawrence Berkeley National Laboratory)
AGF Alternating Gradient Focusing magnet. The SLAC arcs are made up of AGF magnets. See also Achromat.
AGOR l'Accelerateur Groningen-ORsay. a cyclotron resulting from collaboration between KVI and IPN.
AGS Alternating Gradient Synchrotron (Brookhaven)
AIP Accelerator Improvement Project.
AIPE American Institute of Plant Engineers.
ALCOR Algebraic Coalescence Rehadronization
ALE Asymptotically Locally Euclidean
ALEP ALEPH - CERN LEP detector.
ALEPH CERN-LEP detector
ALICE large ion collider detector experiment at the CERN LHC.
ALICE Alpha LInux Cluster Engine.
AMBASS AMBASSador. A model of computer terminal manufactured by Ann Arbor Corporation.
Ambassador See AMBASS.
AME Accelerator Maintenance East. Part of PCD.
AMEP Assistant Manager for Energy Programs.
AMJ AMplitude Jitter. A klystron summary display message indicating jitter in the klystron output.
AMM AMplitude Mean. A klystron Summary Display message indicating that the klystron mean amplitude is out of tolerance.
AMplitude Jitter See AMJ.
Amplitude Mean See AMM.
AMR Adaptive Mesh Refinement
AMRF Accelerator Maintenance RF Systems. This is the department responsible for the maintenance of Linac
klystrons, DR klystrons, klystron vacuum pumps power supplies, pulsed RF systems, phase and RF cooling water systems
(formerly called `Gallery Maintenance').
AMSS Accelerator Maintenance Special Systems. The group responsible for the maintenance of the kickers.
There are approximately a dozen kicker systems on the SLC experiment. See also Kicker.
AMW Accelerator Maintenance West. Part of PCD.
AMY AMY detector at KEK-TRISTAN.
Analog Status See ASTS.
ANRCP Amarillo National Resource Center for Plutonium
Anti-Preprints A section in PPF (Preprints in Particles and Fields) published by the SLAC Library, which
lists publication information for former 'preprints.' Available from SLAC's ftp server at: ftp://preprint. slac.stanford.edu/preprints/Miscellaneous/
AOG Accelerator Operations Group.
AORR Accelerator Operations Readiness Report.
AOT ADC Out of Tolerance. A MCC klystron CUD message.
AP Algorithm processor.
APARS Advisory Panel on Accelerator Radiation Safety.
APD Avalance PhotoDiodes
APE Accelerator Physics Expert. A person recording incidents and problems during operations of the SLC in order to collect
data for analysis and improving operation efficiency. Also called 'Machine Physicist.'
APEX Accelerator Physics EXperiment.
APIARY An early ACROnymn for the B Factory. Alper Garren, an LBL accelerator physicist who first designed the lattice for
what is now referred to as PEP-II, or the B Factory, coined the phrase 'Asymmetric Particle Interactions Accelerator Research Yard.' Pier
Oddone at LBL used an alternate version that captured the physicist's perspective of the high luminosity: 'Asymmetric Particle Interactions
At Roaring Yield.'
APM Automated Photographic Measuring
APM Automated Plate Measurement
Apron The floor area in the CEH. Some Power Supplies and SLC controls hardware are located on the apron. In any sunken experimental
collision area, the apron is the edge at ground level, and the sunken area is called the `pit.' SLAC
APUL Accelerator Project to Upgrade LHC.
Arc One of the two curved, caliper-shaped transport lines of the SLC which transport the two beams from the switchyard to the
final focus area for collision. Since the arcs are curved and without klystron accelerator stations, about two GeV of beam energy is
lost in each arc. See also Achromat.
ARCM Arc Magnet
ARCS Accelerator Resonantly Coupled Energy Storage
ARG ARGUS detector at DORIS.
ARGUS A complete particle detector, upgraded with a microvertex drift chamber for B-meson physics, at DESY DORIS-II.
AROD Accelerator Research and Operations Division.
ARRA American Recovery and Reinvestment Act (2009).
ART Americas Regional Team (ILC).
ASLUND BaBar fast Monte Carlo simulation
ASP Anomalous Single Photon detector and experiment at PEP.
ASPK Automatic SParK chambers.
ASSET Accelerator Structure SET-up. A SLAC experiment to test future linear colliders. A three-meter beam line space in linac
sector two has been reserved to test X-band structure.
ASTE ASTErix detector at LEAR. (CERN)
Astro2010 National Academy of Sciences' National Research council report New words, new Horizons in Astronomy and Astrophysics, released 8/13/ 2010.
ASTS Analog STatuS. An SLC VAX primary.
ATB Augmented Technical Board.(BaBar)
ATIC Advanced Thin Ionization Calorimeter
ATOL ADC TOLerance. A VAX magnet database secondary. The loose tolerance on desired current. Used for calibration, standardization, and for diagnostic knobs.
Atomic Energy Commission See AEC.
ATW Accelerator-Driven Transmutation of nuclear Waste. A proposed Japanese Atomic Energy Research Institute (JAERI) facility that, if constructed, would
bombard long-lived radioactive isotopes with neutrons to convert them into more stable isotopes.
ATWD Analog Transient Waveform Digitizers (NESTOR).
AWG Analysis Working Group (BaBar).
AXAF Advanced X-Ray Astrophysics Facility.
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B Factory "One of two high-energy physics facilities currently in operation in the US (SLAC) and Japan (KEK). Both B Factories collide electrons with
positrons to produce large numbers of B mesons (bound states of a bottom quark and an anti-down quark) and anti-B mesons. By measuring the difference in decays
of B and anti-B mesons, physicists hope to understand CP violation, thought to bathe reason why matter dominates in the universe. At SLAC, the B Factory
accelerated electrons at 9 GeV and positrons at 3.1 GeV at KEK, the energies are 8 GeV and 3.5 GeV.
B845 BNL experiment 845 detector.
BaBar Official name for SLAC B Factory detector. Also known as B B-bar detector. (Named after the elephant in Laurent DeBrunhoff's children's books, with
permission of DeBrunhoff's estate.)
Backplane Signal data bus at the rear of a CAMAC crate or multibus crate.
BACOP Bay Area Construction Opportunity Program.
BAD BaBar Analysis Document.
BAIS BaBar Analysis Information System
BAKS Baksan underground scintillation telescope.
BATS Ballistic Aerial Target System.
BATSE Burst and Transient Source Experiment
BAW Baseline Assessment Workshop. (ILC)
BBS Bulletin Board System. An electronic message center serving a specific interest group.
BC Bubble chamber.
BCAL Barrel CALorimeter
BCAT A database primary.
BCD Bottom Collider Detector (FermiLab)
BCD Baseline Configuration Document (ILC).
BCSG Big Collider Study Group
BD-100 The Neutron Bubble Detector-100 at Chalk River Nuclear Laboratory.
BDIR Beam Delivery and Interaction Region (ILC).
Beam Code A code of two bytes of timing information broadcasted from the MPG to all micros and crates. Each beam is
operated under its own code which establishes its timing pattern. See PPYY and PP Beam #.
BEBC Big European bubble chamber at CERN.
BELLE KEKB detector (Japan)
BEMC Backward ElectroMagnetic Calorimeter
BESS Balloon-borne Experiment with Superconducting Spectrometer (US- Japan)
BFAC B-FACtory.
B-Factory See B Factory.
BFMail An electronic mail system that allows PEP-II and Detector collaborators to send e-mail using the PEP-II Database from any computer platform.
See also PEP-II Database.
BGO Bismuth Germanate. (SLAC E-146 used a BGO spectrometer)
BGRP Beam Group.
BIDB Beam Intensity Display. A database primary.
BIDU Beam Intensity Display Unit. A database primary.
Big Sky A laser spot monitor for the SLC Laser gun. This is the name of a commercially available software and hardware package.
BIS Business Information Systems (SLAC).
BIS2 BIS-2 spectrometer at Serpukhov.
BITNET Because It's Time NETwork. A U.S. academic-based network that relied on the Internet network to transfer messages and files.
Originally it was a separate international network that supported international communication via cooperating networks on most
continents and gateways to unrelated networks.
BITT Business Improvement and Transition Team.
BKDE Brookhaven Kaon Decay Experiment.
Blow Torch Quads A concentration of quadrupole magnets in the front end of the LINAC just after the positron injection point.
The quads transport the large emittance positron beam through Sector 1.
BNHBC British National Hydrogen Bubble Chamber.
BNL ION Brookhaven heavy ion accelerator.
BNL Proposals Experimental proposals put out by the Brookhaven Laboratory.
BOA Basic Ordering Agreement.
BONA Bonanza nonmagnetic detector at DORIS.
BPMP Beam Position Monitor Processor. A CAMAC module that is used to process and digitize the four signals from BPMS.
BSD Business Services Division.
BSIT Business Services and Information Technology. (SLAC)
BSLS Business Systems and Lab Support (BSD-SLAC)
BSM BeamStrahlung Monitor. A device for detecting beamstrahlung radiation in the SLC final focus. See also Beamstrahlung.
BSMD BeamStrahlung Monitor Data. A database primary.
BSO Berkeley Site Office (DOE)
BTS Business & Technology Services (SLAC)
BU BUdget Office.
Bucking Coil A solenoid used to cancel a detector field outside of the detection area (usually also a solenoid). Solenoid coils are used
to cancel stray solenoid fields at the SLC or NPI guns, so that the beam is not adversely affected by the stray fields.
BUG Basic User's Guide. An SLC Control system document.
Bugger List The list of bypassed MPS devices such as ionization chambers, slits, or water temperature interlocks. The list is in a
blue binder on the console desk.
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C Line The beam line extending from the BSY to End Station C. The C line was replaced by the Final Focus Test Beam.
C2CR Colliders to Cosmic Rays, a conference meeting in Prague in Sept 2005.
CA Collider Arc (North or South).
CALF Cursor Addressed Limited Facility. A console using only a single Ann Arbor Ambassador terminal.
Calibration For the BaBar detector: the characterization of the response of the detector and/or detector electronics to
known stimuli. The purpose of calibration is to record those responses, in order to provide a better understanding of the physics
significance of the event data, and to allow optimization of the detector for taking subsequent event data.
CALICE CAlorimeter for the LInear Collider with Electrons.
CALICO Correction Algorithms for Linear COlliders
CALIOPE Chemical Analysis by Laser Interrogation of Proliferation Effluents
CALS Computer-Aided Acquisition and Logistics Support.
CAM CAMAC A klystron SDS message indicating that the CAMAC system is malfunctioning at a given station.
CAMAC Computer Automated Measurement And Control. A system interface between computers and the devices they control.
It is a backplane type crate system incorporating a 5Mb/sec serial link. The SLC CAMAC system includes more than 300 crates.
CAMAC Communication See CAMCOM.
CAMAC DAC Location See DACL.
CAMAC Serial Repeater See CSR.
CAMCOM CAMAC Communication. An interactive program used primarily for diagnostics during early commissioning of new hardware on the
CAMAC system It allowed users to communicate with CAMAC modules directly from a terminal.
CAMR CAMeRa.
CAPRI California Asymmetric Phi factoRI.
CAR Cable Access Receiver. A triple width CAMAC module with an RF receiver (modem). The CAR converts a serial bit stream to parallel data words.
CARD Computing and Administrative Resources Division.
CAS-0 CID Analyzing Station. A horizontal bend energy spectrometer.
CAT Compteur A Trous. (Detector-CERN)
CAT Cable Access Transmitter. A CAMAC module which broadcasts information to other micros on SLCNET channels, or over a baseband link.
CATER Computer Aided Trouble Entry and Report. A VAX database program used to manage maintenance issues in which problems and solutions
are reported and communicated to the proper department. `To cater' means to report a problem in this. (Formerly called ARTEMIS.)
CATS Corrective Action Tracking System. (Superseded by ATS)
CATV Community Antenna Television. A closed broadband coaxial cable network used for information distribution in campuses, buildings and
cities. It is in use at SLAC in the Learning Room in the Library. See also SITN
CB Crystal Ball (see entry under same)
CBAL Crystal Ball detector. (See entry under Crystal Ball.)
CBAR Crystal BARrel detector at CERN-LEAR.
CBE Cylindrical Beam Expander.
CBOX Crystal Box at LAMPF.
CBX Colliding Beam eXperiments
CC Command Center.
CC Cloud chamber.
CC Coordinating Council (ES & H)
CCC Computer Coordinating Committee SLAC
CCG Central Computing advisory Group. Also, Computing Coordination Group.
CCNET A DECNET-based network that includes Carnegie-Mellon, Case Western Reserve, Columbia University, New York University Business School,
Stevens Institute of Technology, and Vassar College. Although now part of the Internet, CCNET sites originally communicated with BITNET and MAILNET through gateways.
CCR Central Control Room. The original control center for the accelerator. Not in use anymore but still wired to some control systems. Located North of the LINAC
gallery near Sector 27.
CCS Bump A betatron phase bump produced with magnets A15, A14, A7, and A6 across the CCS in the SFF or NFF. It produces a small amount of dispersion at the IP to
cancel the residual dispersion at the final focus interaction point.
CDHS Neutrino detector at CERN.
CEA Cambridge Electron Accelerator, a joint Harvard-Massachusetts Institute of Technology Facility. Laboratory was closed in 1974. PHYSICS HIST-->
CEA Bypass Modification to the CEA synchrotron to turn it into a collider.
CEH Collider Experimental Hall. The pit at the east end of the SLC, housing both the MARK II and the SLD detectors and their associated electronics.
CELL CELLO detector at DESY. HEP
Central Control Room See CCR.
CERN ISR CERN proton-proton Intersecting Storage Rings (62 GeV Ecm).
CERN LEP CERN Large Electron-Positron collider (161 GeV, as of 1996)
CERN PS CERN's Proton Synchrotron, a 630-meter-circumference machine that began operation in 1959.
CERN SC CERN cyclotron (600 MeV/c Plab)
CESR Cornell Electron-positron Storage Collider (10 GeV).
CG Computation research Group.
CGWG Cyber Governance Working Group.
CH Collider Hall (See also CEH).
CHEER Canadian High Energy Electron Ring.
Chen Institute Institute for the study of particle astrophysics and cosmology. Established in 2001 at Stanford University and located at SLAC.
CHF Central Helium Facility.
CHM2 CHARM-II neutrino detector (glass) at CERN.
CHRM CHARM neutrino detector (marble) at CERN.
Chromatic Correction Section See CCS.
CIBS CERN-IHEP boson spectrometer.
CID Collider Injector Development. The first accelerator section of the SLC (also called the injector). Also: The general area near the injection guns,
or the PPS area going from the guns to K01 accelerator section.
CIFS Committee on the International Freedom of Scientists.
CISA Committee on International Scientific Affairs (APS).
CLE Central Lab Expansion. (Building 084)
CLEO Cornell magnetic detector at CESR.
CLIC CERN LInear Collider. CERN design for a two stage RF linear collider, described in a series of several hundred 'CLIC-Notes'. Also 'Compact Linear
Collider' (see CLIC Note 302).
CMMCOM See CAMCOM.
Collider Experiment Hall See CEH.
Computer Aided Trouble Entry and Report See CATER.
Computer Automated Measurement and Control See CAMAC.
Console Desk The central desk in MCC where call-in books, log books and other references are located.
Console on Wheels See COW.
Continuously Updating Display See CUD.
COSEPUP Committee On Science, Engineering, and Public Policy (NAS)
COSWA Committee on Science and World Affairs.
COW Console On Wheels. An operator station including an Ann Arbor terminal, a multibus crate with a micro, two displays or CRTs and four to eight control knobs.
CPAPD Chinese People's Association for Peace and Disarmament
CPDF Central Personnel Data File.
Crate A CAMAC card slot chassis and power supply incorporating a backplane which supports CAMAC modules. Crates are connected to each other and to the micro by a
5 Mbit serial link. The crate modules are the last link in the chain which interfaces the computer to the hardware in the SLC control system.
Crate Verifier A CAMAC module whose purpose is to test and verify the operational condition of its crate. Verifier modules are usually installed in slot 1 of the crate.
CRBE First interactive system on the SLAC 360/91 (1968). Replaced with WYLBUR in 1970.
CRESST Cryogenic Rare Event Search with Superconducting Thermometers.
CRID Cherenkov Ring Imaging Detector. An SLD detection system which identifies particles by measuring their velocities.
Crystal Ball Crystal Ball detector. Built by a SLAC/Stanford, CalTech, Harvard, Princeton collaboration. Used on SPEAR (at SLAC) from 1978 to 1981
CSD Computer Science Division (SLAC)
CSE Cross System Extension.
CSR CAMAC Serial Repeater. Used where CAMAC crates are separated by long distances as in the arcs. It is an in-line amplifier for CAMAC signals.
CTIM A database secondary indicating the last time a magnet was successfully calibrated.
CUB Central Utility Building.
CUD Continuously Updating Display. A video display unit in MCC indicating faulted devices in the machine. The better term for CUD is `Status Summary Display (SDS).'
There are several of these units in MCC.
Cursor Addressed Limited Facility See CALF.
CWR Collaboration-Wide Review (BaBar).
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DAC Director's Advisory Committee.
DAC versus Current Goodness See DVIG.
DACL CAMAC DAC location. A magnet database secondary.
DACV A magnet database secondary indicating the last DAC value.
Daczero To run down a magnet to zero current. This is done by putting zero volts on the DAC that controls the magnet's power supply.
DAFNE phi-meson factory at the Frascati National Laboratories (Italy)
DALEC Dump All Low Extracted Currents. A system which senses current in the Damping Ring before extraction and stops extracted beam in the Beam Switch
Yard if current is below a specified threshold.
Damping Ring Injection Point See DRIP.
Damping Ring Phase Processor See DROPP.
Damping Ring RF See DRRF.
Damping Ring Turns Counter See DRTC.
DAPHNE see DAFNE.
DAS Data Acquisition System (SLD)
DASP DESY double-arm spectrometer.
DAT An abbreviation for DATA used in VAX file terminology as in `File.Dat.'
DBC Deuterium bubble chamber.
DBEX DataBase EXecutive. A VAX process which transfers data between the micros and the host computer.
DBGEN DataBase GENeration. The process of rebuilding the database on the SLC VAX. It is a process that adds new signals to the database
and simultaneously checks that no two signals have the same name.
DBInstall Transfer of the complete database from the SLC VAX to the MCC VAX (or vice versa). It involves a brief shut down of operations.
(The computer can't use the database while it is being updated.)
DCH Drift CHamber. (BaBar)
DCI Dispositif de Collision dans l'Igloo. The electron - positron storage ring at ORSAY.
DCL Digital Command Language. The command language used by the VAX.
DCVD Drift Chamber Vertex Detector. It is used for high-precision tracking of charged particles near the interaction point.
DDS Damped Detuned Structure
DEAR Experiment conducted at the Frascati National Laboratories (Italy) phi-meson factory DAFNE
Decnet A VAX communications system protocol between DEC computers. Decnet provides remote file service and remote terminal sessions. It can be used on the
Ethernet cable system.
DELCO Direct ELectron COunter, an experiment at PEP.
DELPHI DEtector with Lepton Photon and Hadron Identification. (CERN-LEP)
DESY HERA DESY Hadron Electron Ring Accelerator
DGRP Display GRouP. A VAX primary.
DIDN Digital Input Device label defiNitions. A VAX primary.
Differential Pumping Station See DPS.
Digital Command Language See DCL.
Digital InputDevice Label Definitions See DIDN.
Digital to Analog Converter See DAC.
DIRC Detector of Internally Reflected Cherenkov light. DIRC is a device developed for use in the SLAC BaBar Detector. Also: Detection of Internally Reflected
Cerenkov Light. Invented by Blair Ratcliff.
Disaster Monitor Obsolete. See Burn Through Monitor.
Display Group See DGRP.
Divide By Four A module which divides by four the S-BAND frequency to get the RF subharmonic used in the damping rings.
DLCO DELCO detector at SLAC-SPEAR or SLAC-PEP.
DLPH DELPHI detector at LEP.
DM Disaster Monitor. See Burn Through Monitor.
DM1 Magnetic detector no. 1 at Orsay DCI collider.
DM2 Magnetic detector no. 2 at Orsay DCI collider.
DOE ACTS Department of Energy Academies Creating Teacher Scientists.
DOE ER Department of Energy, Energy Research. This department supersedes the Energy Research and Development Agency (ERDA), which superseded the Atomic
Energy Commission (AEC).
DOE OBER Department of Energy Office of Biological and Environmental Research.
DOE SF DOE San Francisco Field Office.
DOE/OAK Department of Energy Oakland Operations Office
DOENTS Department of Energy Nationwide Telecommunication Services.
DONUT Direct Observation of the NU Tau. Experiment (FermiLab) that in 2000 directly observed the tau neutrino for the first time.
DORIS DOppel RIng Speicher, a storage ring at DESY.
DPAC Deputy Physics Analysis Coordinator (BaBar).
DPG Deutsche Physikalische Gesellschaft GOV
DPS Differential Pumping Station. A refrigerated section of waveguide which is used to maintain a difference in vacuum pressure between the LINAC and BSY,
yet allows beam to pass (also called Refrigerated Baffle).
Drift Chamber Vertex Detector See DCVD.
DRIP Damping Ring Injection Point. 1. A PPS area between PPS Sector 0 and PPS Sector 2, and the Damping Ring vaults. 2. The point where the beamlines from
and to the rings are connected (the Ten Finger Box).
DROPP See DRPP
Dropp Phase A Damping ring phase shifter used in phase ramping the damping ring RF to phase the beam with respect to the LINAC S-BAND frequency.
DRPP Damping Ring Phase Processor. A CAMAC module driving the Damping Ring Phase Shifter. (Sometimes appears as DROPP.)
DRRF Damping Ring RF. A VAX primary.
DRS DResS.
DRTC Damping Ring Turns Counter. A CAMAC module including a 20 bit counter reset by the FIDO missing pulse and incremented by the MTG: used to synchronize
extraction from the damping rings with respect to PEP RF when filling the PEP storage ring.
DRV Damping Ring Vault. (SLC)
DSP Digital Signal Processors
DTE Data Terminal Equipment.
DUD Deep Underground Detector (IMB).
DUMAND Deep Underwater Muon And Neutrino Detector.
DUSEL Deep Underground Science and Engineering Laboratory (at Homestake Mine, South Dakota). Became SURF.
Dvi A common abbreviation for DeVice Independent. It refers to output produced by TeX, and is often used as the "extension" portion of a computer file
specification containing TeX output, as in "myletter.dvi."
DVI The product of the DAC and power supply transfer functions. For conversion of DAC units to power supply output units. A SLC VAX database secondary.
DVIG DAC Versus current Goodness. The root mean square residual error (in DAC bits) from the linear fit as determined from a calibration. A magnet
database secondary. Also, a SLC VAX database secondary.
Dvips A commonly-used program that converts TeX DVI files to PostScript. An important feature is that it can merge other PostScript files into its
output, permitting an author to include figures and other graphics with text.
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EA Experimental Group A.
EAG Employee Activity Group.
EB Experimental Group B.
EC Experimental Group C.
Echo-7 Experiment conducted at NLCTA in 2009-2010.
ECI Export Controlled Information
ECON Beam energy (GeV) at magnet center from the stored computer configuration currently in use.
ED Experimental Group D.
EDB Energy DataBase.
EE Experimental Group E.
EFCOG Energy Facilities Contractors Group
EFD Experimental Facilities Department, formerly part of SLAC's Research Division, now the Facilities Department in the Operations Directorate.
EG Experimental Group G.
EGRET Energetic Gamma Ray Experiment Telescope,
EH Experimental Group H.
EI Experimental Group I.
ELD Electronics Department (disbanded).
EMPACT Electrons Muons Partons with Air Core Toroids. A proposed experiment at the SSC designed with a high resolution detector capable of utilizing the
ultimate luminosity of the SSC. EMPACT was merged with the Texas collaboration, which was later combined with the L-star and other experiments to form a
second detector effort at the SSC. See also GEM.
EN 17 Engine 17 at the SLAC Fire Station.
Energy Research and Development Agency See ERDA.
EP&WM Environmental Protection and Waste Management. Defunct SLAC department since restructured into two departments: Environmental Protection, and Restoration
and Waste Management. ENVIRO
EP01 Extraction Positron 1. A micro-computer controlling the devices in the extraction line area.
EP02 Extraction Positron 2. The micro-computer controlling devices in the positron vault area.
EPC Experimental Program Control.
EPO Education and Public Outreach (GLAST).
EPW Eugene P. Wigner (1902-1995).1963 Nobel Laureate in Physics.
ERAB Energy Research Advisory Board.
ERDA Energy Research and Development Agency. Superseded the Atomic Energy Commission (AEC),and was itself superseded by the Department of Energy (DOE).
Established 11 October 1974,superseded 4 August 1977.
ERL Environmental Research Laboratories.
Errtalk A VAX process broadcasting errors to terminals.
ES&HCC Environment, Safety, and Health Coordinating Council.
ESA Earth Sciences Associates.
ESAAB Energy System Acquisition Advisory Board.
EVE A text editing program for the VAX.
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F731 FNAL E-731 Spectrometer-Calorimeter.
FAMIS Facilities Asset Management Information System. A Computer Maintenance Management System (CMMS) used by SLAC ETS.
FAS Federation of American Scientists.
FBC Freon bubble chamber.
FBLJA Forward-Backward Lepton Jet Analyzer.
FCS Future Computing at SLAC.
FCST Federal Council for Science and Technology.
FCTS Fast Control and Timing System (BaBar)
FD Fire Department (under contract from the City of Palo Alto).
FEA Finite Elements Analysis. (BaBar)
FEI Firing Error Indicator.
FID FIDucial. SLAC
FIDO FIDucial Output. a chassis which is used as a local timing reference. The FIDO extracts the fiducial pulse from the 476 MHz MDL. The
output of the FIDO is a 119 MHz signal with a missing half cycle to indicate T-zero which is fed to a PDU.
Fiducial A pulse created every 2.8 milliseconds, doubled in amplitude, and used as a marker for timing. This double amplitude signal
is superimposed on the 476 MHz as it is synchronized to the zero crossings of the 3 phase PG&E signal and to the damping ring revolution
frequency. The fiducial is processed by the FIDO and goes to the PDU.
Fiducial Output See FIDO.
FINUDA Experiment conducted at the Frascati National Laboratories (Italy) phi-meson factory DAFNE
FLASH Fluorescence in Air from SHowers. (SLAC-E-165)
Flemming Beam Loading Feedbacks for the SLC damping rings, designed by Flemming Petersen.
FOLA Friends of the Linear Accelerator (SLAC).
FRAB ADONE beta anti beta group detector.
FRAC FRACtional energy gain from the model. A magnet database secondary.
Fractional Energy Gain from the Model See FRAC.
Fractional T1 A communication line consisting of some fraction of a standard T1 line. Fractions are allocated in multiples of 64 Kbps.
A T1 line can support up to 24 64-Kbps channels.
FRAG ADONE gamma gamma group detector.
FRAM ADONE MEA group detector.
Fred A SLC operation nickname for a PPS procedure allowing access into the SLC Arcs while the beam is still in the BSY.
FREJ FREJUS Collaboration - modular flash chamber detector (calorimeter).
FRG Federal Republic of Germany.
FSU Former Soviet Union.
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GAC-SAC General Advisory Committee - Science Advisory Committee. (1960s)
GADC Gated Analog to Digital Converter. A circuit that selectively converts analog signals to a format readable by the computer. A SLC database primary.
Gargamelle CERN Bubble Chamber commissioned in 1971.
GEM Gamma, Electron, and Muon experiment. An SSC experiment which featured the `GEM' detector.
GENIUS GErmanium in NItrogen Underground Setup. A proposal to use a ton or more of naked enriched germanium-76 detectors in a shielding of
liquid nitrogen to probe neutrino mass.
GEONET A program for alignment of SLC.
GGM (CERN) GarGaMelle bubble chamber.
GIAT Get-It-All-Together (SLC Group).
GKS Graphic Kernal System. (Obsolete)
GM General Motors.
GOCO Government Owned, Contractor Operated (DOE).
GOLI CERN GOLIath bubble chamber.
Gopher A menu-based system for exploring Internet resources that pre-dates the World Wide Web. Requires a gopher server, which presents its contents as a
hierarchically-structured list of files.
Greening The action of trimming a phase, a feedback or a BACT to a nominal value or set-point. The new value as displayed by the VAX on its color
monitors will be green (in tolerance) as opposed to red or yellow (out of tolerance).
Grinnel A graphic video display system using the PICT imaging system. Used with the VAX to generate graphics. (The machine is made by Grinnel Systems
Corporation).
GSG Graphic Study Group (SCS).
GT-MHR Gas Turbine -- Modular Helium Reactor.
GWP Ground Warfare Panel.
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H1 DESY-HERA detector
HADES High Acceptance Di-Electron Spectrometer
Handypak Histogram and display package program. Computer graphics software formerly used at SLAC.
Hazardous Experimental Equipment Committee See HEEC.
HBC Hydrogen bubble chamber.
HDBC Hydrogen and deuterium bubble chambers.
HEACC High Energy Accelerator Conference.
HEBC HElium Bubble Chamber.
HEEC Hazardous Experimental Equipment Committee. An ad hoc committee which reviews and approves certain hazardous systems such as pressure vessels or
large volumes of hazardous gases or cryogenic liquids for use by experimenters.
HEEP High Energy Equipment Pool. A SLAC organizational group. Also High Energy Electronics Pool.
HEP High Energy Physics. A major SPIRES database maintained jointly by the SLAC and DESY libraries which in 1999 contained > 390,000 references to
preprints, journal articles, reports, theses, and conference papers. Used worldwide. Supserseded by InSPIRE-HEP.
HER High Energy Ring for PEP-II, a 9 GeV storage ring for electrons.
HERA See DESY HERA
HERMES an experiment at DESY.
HESYRL Hefei SYnchrotron Radiation Laboratory.
HLBC Heavy-Liquid Bubble Chamber.
HOME HOMEstake underground scintillation detector (South Dakota)
HOT Sponsored by SLAC Computing Services, this meeting includes a review of scheduled power outages, a discussion of identified problems and outstanding
issues, along with a brief recap of the Accelerator Operations daily meeting. The meeting is open to all laboratory staff.
HRS PEP High-Resolution Spectrometer (SLAC).
HSTA Hardware STAtus. A VAX database status bit indicating if a device is on-line or off-line.
HYBR HYBRid: bubble chamber + electronics.
HYC Hard Y Corrector.
Hypercard A kind of programming environment that organizes all forms of information into what appear as stacks of index cards. The user then
manipulates those stacks to create applications.
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I&C Instrumentation and Control. Obsolete. See CD.
IAPCM Institute of Applied Physics and Computational Mathematics
IDA Institute for Defense Analysis.
IDIM Isolated Digital Input Module. A CAMAC module with 32 individuals status input bits.
IDOM Isolated Digital Output Module. A CAMAC module with 32 channels of opto-isolated output incorporating full control and read-back of output
conditions.
IFB Invitation For Bids.
IFC International Finance Committee (BaBar).
IISS International Institute for Strategic Studies.
IMB Irvine-Michigan-Brookhaven underground Cherenkov detector experiment.
IMB-3 Irvine-Michigan-Brookhaven underground Cherenkov detector experiment.
IMRSS International Monitored Retrievable Storage System.
INSPEC INformation Services for the Physics and Engineering Communities.
IPL Initial Program Load. A klystron CUD message indicating that the klystron PIOP needs to be IPLed.
IPL Initial Program Load. On VAX system, it is used to re-boot or initialize a COW or other micro.
IRG Institutional Reading Group (BaBar).
ISABELLE Intersecting Storage Accelerator + BELLE (beauty): particle physics facility at Brookhaven National Laboratory approved for
construction in 1978 but cancelled in 1983. (DOE)
ISG International Study Group (NLC)
ISODARCO International School On Disarmament And Research on COnflicts (Italian Pugwash Group).
ITCAP International Technical Assistance and Cooperation.
ITDS Information Technology Departmental Support group. (SLAC)
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JADE JADE detector at DESY.
JAZELLE A Data management system for SLD, based upon ZEBRA, a system first
developed by CERN.
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KISNET Keep It Simple NETwork. A SLAC SLC network.
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LAC Liquid Argon Calorimeter. A SLD detector system. See also Calorimeter.
Landau Damping Obsolete. See BNS Damping.
Laser-wire A high-powered laser beam focused down to the smallest spot possible and used in the SLC to measure the size of the interaction
point. The SLC laser-wire, commissioned in July, 1996,replaces conventional wire measures, which break apart from thermal shock at
high beam intensities.
LASS Large Aperture Superconducting Solenoid spectrometer at SLAC. A decommissioned ESB experiment.
LAVC Local Area VAX Cluster.
LEACH Local Electronics And Cryogenics Housing.
LEBC Little European Bubble Chamber (CERN)
LEEP Laboratory Electronics Equipment Pool.
LEM Linac Energy Management. A VAX procedure used to adjust the LINAC quadrupole focusing strengths to match the changing beam energy profile.
The beam energy varies as klystrons trip off, or their phases are changed.
LGPS LarGe Power Supply. A database primary. Each LGPS is controlled by a CAMAC module (PSC).
LIB LIBrary.
LIN Abbreviation for Linac. PHYSICS
LINE An Interactive Graphics Program.
LIRIC Linac Improvement and Reliability Investigation Committee.
LITA Library and Information Technology Association.
LMAC LEP Machine Advisory Committee.
LRP Long Range Plan (DOE).
LST Limited Streamer Tubes. (BaBar)
LTDA Long-Term Data Access. (BaBar)
LTR Linac To Ring.
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M-2 Mark II Experiment.
M-3 Mark III Experiment.
MAC MAgnetic Calorimeter detector at PEP/SLAC
MAC Minority Affairs Committee.
MAC CALF A Macintosh computer used as a terminal on the VAX control system. See also CALF.
macropackage A collection of TeX macros, or definitions, that are used as a group to typeset documents following the guidelines
of a specific page layout or style.
Magnetic Fusion Energy Network See MFENET.
Main AG The power supply, Main Alternating Gradient, that drives the 920 bend magnets of the SLC arcs.
MARK Name given to several generations of both accelerators and detectors created and used at HEPL and at SLAC.
(See http://www.slac.stanford.edu/history/mark.shtml.)
MARK I A famous SLAC experimental detector, used to discover the PSI particle and the tau lepton at SPEAR in the mid 1970s.
MARK II First used at SPEAR as a replacement for the MARK I detector, this SLAC experimental detector was then used in region 12 of PEP during the 1980's,
and again used as the SLC primary detector until November of 1990. See also MARK I.
MARK III An experimental detector used at SPEAR after Mark II.
Massimo Massimo Criteria are the orbit positions at the back end of each ARC, where the beams pass through the centers of the small- aperture fixed collimators
at the entrance of the FF. The x and y orbit values are usually posted near COW 3 in MCC and in the FF SLC TODAY book. Named after Massimo Placidi, a CERN
physicist who assisted in commissioning the SLC final focus. SLAC
MAT An abbreviation for MATLAB used in VAX terminology for a type of mathematical problem solving file : ` File.Mat.'
MBCD MultiBus CAMAC Driver. A Micro circuit card used to interface with CAMAC crates.
MCC Main Control Center. The building (Bldg 005) from which the accelerator is operated. Also, the actual control room within that building.
MCD Mechanical Component Design group (at SLAC)
MCR Main Control Room.
MEL-FS Multiprogram Energy Laboratory - Facilities Support.
MESSENGER MErcury Surface, Space ENvironment, GEochemistry, and Ranging mission.
Mezzanine The name of the Collider Hall second floor.
MIC Monolithic Integrated Circuit.
MICE Muon Ionization Cooling Experiment (RAL)
MICOM A Switching box to manage broadband communications between terminals (via the servers) to the VAXes, the IBM 3270 and the Ethernet network. A terminal
which is serviced by the `MICOMswitch' can be used on any of the SLAC site's main computers.
Micro Microcomputer. The SLC system includes about 70 microcomputers with 8086 or 80386 multitasking CPUs. Most micros are used to a) drive CAMAC crates
which in turn control accelerator devices and instrumentation, b) perform standardization algorithms for magnets, and c) communicate with the VAX by either
receiving instructions or returning information for monitoring and display purposes.
Microcomputer See Micro.
Midas See MidasWWW.
MidasWWW The first fully-functional X-window GUI browser for the World Wide Web, written by Tony Johnson at SLAC. It features a multifont hypertext
display, source code viewer, Motif Style Guide compatibility, and runs under UNIX and VMS. MidasWWW strongly influenced the subsequent development of the
Mosaic and Netscape Navigator browsers.
MILAGRO Gamma Ray observatory at Fenton Hill, New Mexico.
Mini Sam Small Angle Monitor, used to detect Bhabha-scattered electrons in the Mark II detector.
MINOS Main Injector Neutrino Oscillation Search (at Fermilab)
MINUIT A FORTRAN numerical minimization program written by Fred James (CERN) in the 1970s.
Missing Pulse See FIDO.
MK-II MARK II Detector. The first SLC detector, replaced at the SLC by the SLD. See MARK II.
MKS MKSU Protect A klystron summary display status indicating that the MKSU went into `protect mode.'
MKSU Modulator Klystron Support Unit.
MKSU Protect See MKS.
MKT MKSU Trigger Enable Fault A klystron summary display indicating an interlock fault that causes inhibition of the modulator firing triggers.
MNT MaiNTenance A klystron summary display message. In maintenance mode the klystron may be run locally. This is accomplished by triggering the
unit at a time when there is no beam present.
MOAN Modern Offline Analysis Nexus.(MARKIII)
MOD MODulator. A klystron summary display message indicating a modulator interlock fault. Each klystron is powered by a modulator that produces
accurately-timed high-voltage pulses of the proper width (3.5 micro sec), amplitude and polarity, to pulse the klystron tubes. Modulators can pass
4000 A peak current, and are triggered at multiples (and sub-multiples) of 60hz by the MTG. When we speak of `triggering a klystron,' we actually
mean we are triggering its modulator.
MODEM MOdulator-DEModulator. A device or program that enables a computer to transmit data over telephone lines.
MODulator See MOD.
MORE Microwave Oil Recovery Experiments.
MORSE Multigroup Oak Ridge Stochastic Experiment.
Mosaic A mouse-driven interface to the World Wide Web (WWW) developed by NCSA. (See also MidasWWW)
Mover A stepping motor used to move a magnet with respect to the beam. The beam steering in the SLC arcs is done with magnet movers instead of the
more conventional `trim winding' method.
MP00 Master Pattern generator zero. A microprocessor in MCC that generates the PPYY signals.
MRK1 See Mark-I
MRK2 See Mark-II
MRK3 See Mark-III
MRKJ Mark-J detector at DESY
MTF Memorandum-To-File.
MTG Master Trigger Generator. Located in CID, this unit synchronizes the fiducial with respect to PG&E and the damping rings.
MTI Multispectral Thermal Imager
Multibus A backplane crate system similar to CAMAC or NIM designed to hold modules. SLC micros use a multibus system.
Multibus CAMAC Driver See MBCD.
MURA Midwestern University Research Association. Group working on high energy proton machine in the 1950's. Donald Kerst, Director, 1956 .
MUSASHI Monoenergetic Ultra-Slow Antiproton Source for High-Precision Investigations, a group of the ASACUSA collaboration.
MUX An abbreviation for Multiplexer.
MWC Minority and Women's Committee.
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NA31 CERN NA31 Spectrometer-Calorimeter.
NAIAC Nonproliferation, Arms Control and International Security Advisory Committee.
NAP Non-proliferation Advisory Panel.
NBS National Bureau of Standards (US).
NCA North Collider Arc.
NDR North Damping Ring.
Netscape Netscape Communications Corporation, founded in 1994. Products included the popular Navigator Web browser, web servers, and
tools for building intranets.
NFF North Final Focus.
NFS National Facilities Survey.
NIM Nuclear Instrumentation Module. A backplane module crate system similar to the CAMAC system. The NIM system does not include a computer interface.
NIT North Injection Tunnel. The electron transport line going from the BSY to PEP. Also: North Injection Transport.
NLC Next Linear Collider.
NLTR North Linac To Ring.
NN-20 DOE/NN Office of Research and Development
Nomad A relational database in use at SLAC for numerous accounting and business applications. Nomad has the unique ability to transform a flat file
into a searchable database without any restructuring of the file.
NOMAD Neutrino Oscillation MAgnetic Detector (CERN)
Non-Production Web Pages Pages and directories used to develop files which will eventually be launched into production. This is often your
own ~username directory, but is may also be somewhere else in your personal space not linked to the SLAC home page. See also: Production Web Pages.
North Injection Tunnel See NIT.
November Revolution In physics, November 1974, when two separate experiments at SLAC and at Brookhaven independently discovered the first of a
new set of particle states, the J/Psi particle. (See http://www.slac.stanford.edu/history/revolution.shtml.)
NPAC Nuclear Program Advisory Committee.
NPI Nuclear Physics Injector An electron gun in the LINAC, located at Sector 25, that delivers high current beams at low energy, which is not
possible using the entire linac. It is also used to generate electrons for low-energy running when the front end of the LINAC is down for
maintenance or for some other reason.
NPL National Priorities List (from CERCLA)
NPO Non-Purchase Order.
NRB North Reverse Bend. See also RB.
NREX North Ring Extraction. See also NREX loops.
NREX Loops North Ring Extraction Feedback Loops (Circuits).
NRO National Reconnaissance Office.
NRTL North Ring to LINAC.
NSCY A pair of numbers in the database. The first number represents the number of standardization cycles, and the second number represents the wait
period before starting back down during a cycle in milliseconds (how long you wait at the top of the standardize).
NTM National Technical Means
NUCHEP Nippon-US Commission for HEP.
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OBLX OBELIX detector at LEAR HEP
OC Original Cataloging.
OCS Office of Confinement Systems.
OER Office of Energy Research.
OLYA Detector at VEPP-2M and VEPP-4, Novosibirsk.
OMEG CERN OMEGA spectrometer.
One-Shot To one-shot refers to an SLC operator manually activating a feedback loop to make one attempt to automatically adjust to within its preset
tolerances. This corrects for devices that slowly drift from their ideal settings, without risking the possible malfunctions that might arise if the
computer made continuous or frequent adjustments without the operator's monitoring of the results.
OPAC Online Public Access Catalog. The electronic descendant of the library card catalog, an OPAC contains bibliographic records and is interactively
searchable. Access to an OPAC maybe limited to members of its generating institution's community, or may be open to a broader set of network users.
OPAL OPAL detector at LEP.
OPCW Organization for the Prevention of Chemical Weapons.
OSP Office of Special Projects.
OSPK Optical SParK chamber.
OST Office of Science and Technology (1962-1973, functions transferred to NSF).
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PA Public Affairs.
PAC Physics Analysis Coordinator (BaBar).
PacMan A concrete shielding structure at each end of the SLD detector between the endcaps and the pit walls. The two huge overlapping sections of
each PacMan can be opened for access to the beam pipe.
PAD Phase and Amplitude Detector An RF measurement module which has been designed to measure the phase difference between two RF inputs: the
signal source and the reference source. The PAD data is fed into the database after several adjustments (linearization of pad error, MDL length,
upstream sources). The reference signal is usually derived from the MDL on a local reference line called PRL.
PADO Phase and Amplitude Detector Offset. The time at which the PAD samples.
PAO Public Affairs Office
Paranoia A VAX process that handles error messages from micros or from a SCP process that are destined either for a user or a SCP terminal.
All error messages are written to the ERRLOG list which can be retrieved at any later time when investigating a fault or other action.
PAU Pulsed Amplitude Unit. A CAMAC module used to control devices such as pulsed magnets and phase shifters which must change state
at the accelerator pulse rate (up to 120 PPS).
PAWN Producer-Archive Workflow Network (NARA)
PBC Propane Bubble Chamber.
PBH Pulsed Bend Horizontal. Refers to the dipole magnet used to switch electron bunches to the North Ring and positrons to the South Ring.
Note that this magnet is no longer pulsed.
PCNL President's Council on the National Laboratories.
PCR PEP Control Room.
PD Physics Discussion.
PD Program Deputy. (MCC)
PDP-11 Programmed Data Processor. A Digital Equipment Corporation machine.
PDU Programmable Delay Unit. A CAMAC module that contains in memory a beam matrix of 256 beam code possibilities contained in 16 channels
and a desired time of output pulses for each of these channels. The PDU receives the beam code from the micro and the fiducial signal from the
FIDO. In this way the two data paths (timing and beam codes) meet.
PDU Channel One of the 16 channels of a PDU.
PE&D Plant Engineering and Design.
PEG Physical Electronics Group.
PEGASYS PEp Gas tArget Spectrometer sYStem.
PEGGY Polarized Electron Gun (with additional gy to make it affectionate ).
PEP Positron Electron Project (originally the Positron Electron-Proton Project). A 2.2km circumference storage ring at SLAC with six
interaction points, two SSRL beam lines, electron-positron storage and collision capability, 4 - 18 GeV energy range, and 50 mA currents.
PEP was upgraded to be the site of the SLAC B Factory. See also PEP-II. SLAC
PEP II See PEP-II.
PEP OIC Operator-in-charge of PEP.
PEP2 PEP-II (Use for Spires).
PEP-II Upgraded SLAC PEP electron-positron collider. Its transformation into an asymmetric B Factory included addition of a second storage
ring, as well as new beam power and control systems.
PEP-II Database The PEP-II Project-wide Oracle-based database. It is envisioned to encompass off-line data for machine configuration and
administration, as well as much of the detector counterpart data.
PEPUP PEP UPgrade.
Phase Bump The `Phase Bump' is used to change the phase of the RF fill of an accelerator section. The general intent is to change
the average phase of the RF seen by one beam, independent of that seen by the other beam. This is achieved by tweaking the phase
(plus or minus) 90 degrees in the first or last 60 ns of the fill time. Currently, this method is used to adjust the energy spread
of the scavenger beam.
Phase Decker See Phase Bump.
Phase Jump A Phase Shifter to compensate for the beam loading effect of the Damping ring RF cavities.
Phase Ramp Damping Ring RF Facility for varying the phase so that the time of arrival of the extracted beam at the compressor
and LI02 will be changed. Phase Ramp is moved in units of S-BAND degrees or 0.973 picosecond. Operators tweak Phase Ramp to adjust
the beam spectrum and energy at the end of the LINAC, using X-ray screens in the BSY area.
Phasefix A system for measuring and correcting the tune of the SLC arcs.
PI Mode One of the two modes of bunch oscillation caused by the RF in the Damping Rings (the other one is called O MODE). In Pi
mode the two bunches in a ring are opposite and oscillate toward each other (they are Pi radians, or 360 degrees out of phase with each other).
PIO Public Information Officer.
PIOP Programmable Input/Output Processor. A CAMAC module used for klystron control.
PIP PEP Injector Project
Pipeline Mode A PAU mode of operation in which a beam code signals the PAU to act on the following beam code. This mode of operation is
often used in dealing with time slot separation problems.
PLO PLant Office
PLS Polarized Light Source. The SLC laser Gun.
PLUTO Detector at the DORIS electron-positron collider (DESY).
PMAG Pulsed MAGnets. A VAX database primary.
PMOG Project Management Oversight Group. (Obsolete--See PMAG)
PNE Peaceful Nuclear Explosions
PNet Pattern Network Module.
PNPP Particle-Nuclear Physics Pool.
POC Publications Oversight Committee (American Physical Society).
Polarized Electron Gun See PEG.
Polarized Light Source See PLS.
Poll 0 A VAX process which checks all SLCNET micros for database status changes and errors. If a micro is not talking anymore, it is
removed from the poll list and its poll becomes `0.'
POOP Principles Of OPeration. An SLC control system document.
POPA Panel on Public Affairs (APS).
Positron Electron Project See PEP.
Pp Beam # The higher byte of the PPYY is the PP beam code number used by the T-Matrix to define a certain beam. This number is
generated by MP00 and broadcast to all micros.
PPC PEP Policy Committee. (Obsolete)
PPF Preprints in Particles and Fields. A weekly list of new preprints received in the SLAC Library and entered in the HEP database.
Once available on the web athttp://www.slac.stanford.edu/library/documents/newppf.html. See also 'Anti-Preprints.' Ceased publication in 1993
PPOM Pulsed Power Output Module. A CAMAC module.
PPYY A 16 bit word used by timing software and hardware to select times at which devices should be triggered on an upcoming machine pulse. It is generated
at MP00 and broadcast at 360hz on the SLCNET to the various devices. It is received by the CAR in Crate 1 of a typical sector micro. PP is the high order
eight bits or `beam code' used to select the time delays for devices such as klystrons and kicker magnets. YY is the low order eight bits, used to synchronize
additional devices such as BPMs.
PRAW Phase RAW. A database secondary. It is the raw phase measured by the PAD.
Preprints in Particles and Fields See PPF.
PRIF Peace Research Institute Frankfurt
PRIM Pattern Receiver Interrupt Multiplexer. A multibus module which receives PPYYs from the CAR and interrupts the micro CPU.
PRIM-9 Interactive computer graphics program for Picturing, Rotation, Isolation, and Masking in up to 9 dimensions. Developed at SLAC in the 1970's.
Primary A class of signal names in the VAX SLC database.
Principles of Operation See POOP.
PROD Photon Research and Operations Division.
Production SLAC Web space Holds all the SLAC Web pages and associated files connected to the SLAC Core Pages except Individual Home Pages. Files
in the Production Space are made available to the Web by authorized SLAC WWW server that use the standard port (now 80), for example, files in
/afs/slac/www served by the www host.
Production Web Pages Pages and directories that are linked directly or indirectly from the SLAC Home Page. Production pages are meant to be viewed
(i.e., they are in production) by any intended audiences, including people outside of SLAC. See also: Non-Production Web Pages.
PROF PROFile Monitor. A VAX primary.
Programmable Delay Unit See PDU.
Project M The Stanford University project, developed by interested parties in the Hansen Laboratories and Physics Department, for the construction
of a 2-mile, multi-BeV linear electron accelerator. Called Project M from 1956 - 1960, the project was renamed Stanford Linear Accelerator Center in 1960.
The M stood for Multi-Gev and/or for Monster.
Proton-Electron Project See PEP.
PS Photon Science (Directorate-SLAC).
PSAC Presidential Science Advisory Committee (US)
PSC Power Supply Controller. A single width CAMAC module used to control large power supplies. The PSC contains both a DAC and/or an ADC plus control
and status bits.
PSIS Photon Science Integration Study. (SLAC)
PSOG Power Supply Operations Group. Obsolete: was part of EFD.
PSU Programmable Synchronization Unit. Provides timing for delays longer than the fiducial period, which is about 2.8 milliseconds, or provides multiple
pulses per fiducial. Used to synchronize devices to the damping ring beams. The PSU delay, period and pulse width are programmable.
PTT Post Telephone and Telegraph Administration. A generic term for government-operated common carriers in countries other than the U.S.A. and Canada.
Examples of the PTT are British Telecom in the United Kingdom, the Bundespost in Germany, and the Nippon Telephone and Telegraph Public Corporation in Japan.
Public Disk A Macintosh in the computer center used as a file server for the MAC network.
PVSO Pressure Vessel Safety Officer. (SLAC)
PWU Programmable Width Unit. A CAMAC module used for gated pulses such as gun triggers. Triggers are received from the backplane and outputs are
pulsed with programmed duration.
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QSPIRES A web server which is used to remotely query various SPIRES
databases (HEP, BOOKS, CONF, INST, etc.). The QSPIRES query is used to locate e-mail
addresses for physicists worldwide. QSPIRES is available via the Internet at
qspires@slac.stanford.edu.
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RA1 - RA6 Rate (0 through 120) on time slots 1 through 6.
RAB Receiver ABort.
RADCON Radiological Control manual.
RAMM Remote AMplifier Monitor. A SLC VAX primary.
RB Reverse Bend. The section near the upstream end of each SLC arc where the curvature changes direction so that the beams can be steered around toward the IP.
RCBC Rapid-Cycling Bubble Chamber. HEP
RD Research Division. A SLAC organizational group.
RE Klystron Reflected Energy. A klystron summary display message indicating problems with reflected energy. See also RP.
RED Research Electronics Division. (SLAC)
RESA Research Equipment Storage and Assembly.
Rhumbatron Cavity resonator invented by Hansen to serve as a powerful electron accelerator with relatively modest power consumption. As a particle accelerator,
it was surpassed by the Kerst betatron, but it became a crucial part of Stanford's first microwave tube: Varian's klystron.
RIPL The ripple readback from the SAM module.
RND Reducing Nuclear Danger.
Rollfix A system for compensating for the rolls in the SLC arcs.
ROSAT ROentgen SATellite. An X-ray observatory developed through a cooperative program between Germany, the US and the UK. Launched June 1 1990 and turned
off February 12, 1999.
RPC Resistive Plate Chamber. (BaBar)
RPC modules Resistive Plate Counter modules for detecting muons and long-lived kaons in the Belle detector (KEKB)
RTL Ring To LINAC. A transport line section that brings the beam from either damping ring back to the LINAC.
Rx Tone Receiver. See Tone Loop.
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S/C Sub Contract.
SAAC Scientific and Academic Advisory Committee.
SABER South Arc Beam Experimental Region.
SAC Science Advisory Committee.
SAD SLAC Advanced Design Committee (ca. 1968)
SAIC Science Applications International Corporation.
SAMMI SLC Automatic Magnet Measuring Instrument.
SAMPLE an experiment at MIT-Bates, measuring backward-angle electron scattering from hydrogen and deuterium targets.
SAN Department of Energy San Francisco Operations Office.
S-BAND Feedback A feedback system to lock the beam extraction time from Damping Ring to an S-BAND (LINAC RF) reference.
SBIR Small Business Innovation Research
SBSS Science Based Stockpile Stewardship
SCA SuperConducting Acceleration. Also, SuperConducting Accelerator (Stanford University).
SCC Serial Crate Controller. A camac module driving an individual crate and used to interface between the serial link multibus and the
CAMAC modules in that crate.
SCIP Stanford Center for Information Processing.
SCP SLC Control Program (Pronounced SKIP). The process running the COWs and other consoles when they are controlling the SLC machine. Each
console can be operated under its own SCP program.
SDC Solenoidal Detector Collaboration (SSC)
SDI Strategic Defense Initiative.
SDR South Damping Ring.
SDS Status Display Summary. An MCC display that shows the operational status of various SLC devices.
SEAB Secretary of Energy Advisory Board (DOE).
Secondary A class of subsignal names in the VAX SLC database. Each primary signal can have up to 255 secondaries or subsignals.
SEP SSRL Enhancement Project
SERC Science and Engineering Research Council.
SETL A magnet parameter indicating the settling time for a power supply to stabilize after a change. A SLC VAX secondary.
SFT Super Fixed Target beauty Facility. Competing with other B factory ideas, SFT proposed using a 20Tev proton beam to measure CP violation at the
SSC Laboratory. The SFT proposal was turned down in review.
SHAP Supplemental Housing Allowance Program.
SHB SubHarmonic Buncher. The bunching system after the CID gun that groups the electrons into the two bunches needed by SLC. The two SHB (178.5 MHz) are
subharmonics (1/16 of S-Band) of the LINAC RF frequency. It incorporates the following: A) A magnetic mirror to protect the gun, B) Ten solenoids to maintain
the beam through the pipe and inhibit the spiraling of the electrons, C) two subharmonic bunchers in which the bunching is accomplished through velocity
modulation using a standing wave resonator and two cavities.
SHF SLAC Hybrid Facility photon collaboration.
SII SLAC Improvement Initiative.
Simple Timing Buffer See STB.
SIP Summary Information Process. A database primary.
SIPRI Stockholm international Peace Research Institute.
SISE Summer Internships in Science and Engineering. See ERULFs.
SITN Stanford Instructional Television Network. Operated through the Stanford Center for Professional
Development (SCPD). SCPD broadcasted over 250 Stanford courses a year.
SLAC-LBL detector Original name of the Mark I detector. One of the first large solid angle detectors. Built by SLAC Group E (Martin Perl and Gary Feldman),
Group C, and a Lawrence Berkeley Lab group led by Willy Chinowsky, Gerson Goldhaber, and George Trilling. Detector was later expanded to improve muon detection
and then modified to improve the electron and photon detection.
SLAM SLC LAM Generator. A CAMAC module.
SLC Stanford Linear Collider (100 GeV Ecm). Originally SLAC Linear Collider.
SLC Control Program See SCP.
SLC Large Detector See SLD.
SLCCS SLC Control System. Software system designed in the early 1980's for accelerator control.
SLCNET The broadband local area digital network that communicates between the VAX and the micros located in the various SLC areas. This is a custom high speed
logic star network using MULTIBUS.
SLD SLAC Large Detector. A particle physics detector optimized for the SLC interaction point. SLD has also been called the Stanford Large Detector and the
SLC Large Detector. Sources close to the experiment confide that SLD was originally called the Slick Little Detector.
SLD-Notes Publication produced by the SLD Collaboration on an irregular basis.
SLEAP Stanford Linear Electron Accelerator Project. (1960's name for what eventually became SLAC. Came after Project M name.)
SMC Stepper Motor Controller. A CAMAC module.
SMP Strategic Military Panel
SMPS SMall Power Supply. A SLC VAX primary.
SNOOP Diagnostic module for Fastbus.
SOB StandOff Box. (BaBar)
SOPF Stanford Outdoor Primate Facility
South Injection Tunnel See SIT.
SPASM Single-Pass ASseMbler.
SPC Single Pass Collider.
SPCP Single Pass Collider Project (Proposed in 1980).
SPI Sign of Polarization Inverter, a SLC Polarized Light Source Subsystem.
SPIRES Stanford Public Information REtrieval System. A database management system widely used for large bibliographic databases. At SLAC, BINLIST, HEP,
BOOKS, DRAW, CONF, SEMINARS, SERIALS, and INST are some of the databases maintained in SPIRES.
SPRK Spark chamber.
SRC Science Research Council.
SSC Superconducting Super Collider (defunct).
SSC Advisory Panel See SSCAP.
SSCAP The SSC Advisory Panel. An international committee of physicists that determined the SSC experimental program.
SSP Science Simulation Plan
Stanford Public Information Retrieval System See SPIRES.
STANFORD-PRINCETON STORAGE RINGS A figure-eight, weak-focusing, electron-electron collider built at Stanford in 1958-1963 by a group led by
Gerald K. O'Neill (Princeton) and Burton Richter (Stanford). Using the Stanford MARK III accelerator as an injector, the collider consisted of two
rings, each ten feet in diameter, in which electrons circulated in opposite directions, colliding at the intersection point. When built, the rings
contained the largest ultra-high vacuum system in the world. The energy lost to synchrotron radiation was compensated for by a radio frequency
system which gave an electron a boost of energy as it came through the accelerating cavity. The detector used on the rings was an optical spark chamber.
STEP A SLC VAX primary which includes stepping motor status and other devices using such motors.
STRC STReamer Chamber.
Summary Information Process See SIP.
SUP Seismic UPgrade.
SuperB A high-intensity B-factory planned for construction near Frascati in Italy
Supersloop Working name for 1970's project to convert the SLAC linac to a superconducting accelerator. (Project was canceled)
SUPF Stanford University Primate Facility (former SLAC neighbor).
System 20 Box A local network server used by the VAX computers to communicate with their terminals. System 20 uses one frequency band of the
CATV network. The box is made by SYTEK.
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TBD To Be Done.
TBLC Two-Beam Linear Collider
TCM Toroid Charge Monitor. A CAMAC module used to digitize beam current intensities measured by the toroids in the beam line.
TD Technical Division.
TDC Time to Digital Converter. A database primary.
TDL Technical Data Library. Branch of SLAC Library devoted to specifications, standards, and vendor catalogs. Discontinued in 1993.
Technical Data Library See TDL.
TEXAS Totally hermetic EXperiment At the Supercollider (SSC).
Text Processing Unit See TPU.
Tick The finest timing increment in the SLC timing system. 1 tick = 8.4 nanoseconds (119 MHz).
Time Matrix See T-Matrix.
Time Nominal See TNOM.
Time Projection Chamber See TPC.
TIS Technical Information Services Department.
T-Matrix A VAX database which contains most of the timing data necessary to run all the triggerable devices in the machine. Each micro contains
the piece of the T-Matrix it needs, called the beam matrix. `IPLing' the micro refreshes or reloads the T-Matrix into the micro.
TMUX Trigger MUltipleXer. A CAMAC module which sends a pulse to the GAP Voltage controller module.
TNOM Time NOMinal. A T-Matrix or beam matrix time delay relative to the reference beam. Can be programmed to give a single value offset to all
triggered devices in a micro for any given beam code. Done only with BDL.
TNRLC Texas National Research Laboratory Commission.
TOPS TOp hat Pulse Shaper, a SLC Polarized Light Source Subsystem.
TOPS Technology Opportunities for increasing the Proliferation resistance of global civilian nuclear Power Systems
TPAP Transcontinental Persistent Archive Platform.
TPC Time Projection Chamber. A two gamma detector formerly located at PEP Region 2. Also, a detector for the ILC under development at DESY,
and a detector for the LZ experiment.
TPU Text Processing Unit. A DEC utility to handle file editing programs on the VAX. TPU is used to create MACROs for the EVE editor.
Transiac A brand name. It usually refers to the 16 channel DAC CAMAC module used throughout the SLC.
TT Tiger Team. GOV
TTBT Threshold Test Ban Treaty
TWA Treatment Works Approval.
TWIXT Region upstream of a dipole between the two magnets.(On LASS, twixt was downstream of the solenoid and upstream of the dipole.)
TWR Transient Waveform Recorder. A CAMAC module.
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UG Unified Graphics. (Obsolete)
Unibus A bus system developed by DEC for the PDPs and other DEC computers.
USPCI U. S. Pollution Control, Inc.
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Valiant Little Terminal See VLT.
VAX Virtual Access computer made by Digital Equipment Corporation.
VAX CAMAC Channel See VCC.
VAX SLCNET Channel See VSC.
VBA Very Big Accelerator.
VCAM Video Cable Access Module. A CAMAC module which can be programmed to multiplex any one out of eight video signals from cameras and to transfer
that signal to one of five possible CATV channels. It multiplexes the video signals used by the operators at MCC.
VCC VAX CAMAC Channel. A chassis which interfaces the VAX unibus DMA system to the CAMAC system.
VCO A chassis used to vary the damping ring frequency.
VDCI Video Digitizer Clock Interface. A CAMAC module.
VDS Vertex Detector System. (Mark II) HEP
VDST Video Distribution SysTem. A VAX primary.
VDT Video Display Terminal.
Video Cable Access Module See VCAM.
Virtual Machine See VM.
Virtual Machine/Conversational Monitor System See VM/CMS.
VM Virtual Machine. Refers to the operating system on the IBM 3081 or 3270.
(Phased out at SLAC in 1997.)
VM/CMS Virtual Machine/Conversational Monitor System. IBM main interactive timesharing system.
VMS Virtual Memory System. DEC's designation for the VAX operating system. COMPUTING
VSC VAX SLCNET Channel. Refers usually to the interface circuit and firmware (the VSC box) between the VAX and the SLCNET.
VVC Virtual Visitors Center
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WDC Washington, DC GOV
WIC Warm Iron Calorimeter. A part of the SLD detector.
Wirefix A System for making harmonic corrections in the SLC arcs.
WIS Women's Interchange at SLAC.
WISRD Wire Imaging Synchrotron Radiation Detector. Part of the system that measured beam energies at the SLC.
WSC Web Support Coordinator
WWWCC WWW Coordinating Committee (SLAC)
Www-tech World Wide Web Technical Committee (SLAC).
WYLBUR A text editing program for the VAX. It was a component of SLAC's mainframe system before VM, the IBM 360 OS/VS.
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XEBC Xenon bubble chamber.
X-Ray Screen A profile monitor off the beam path where x-rays created by a synchrotron radiation source hit some material to generate secondary
emission of visible light. The light itself is recorded by a video camera and transmitted by cable to MCC. This type of beam monitor is used
extensively in storage rings where anything placed in the beam path would kill the stored beam.
Xyplex One of the two local network servers to communicate between the VAXes and the terminals.Xyplex is a brand name for this connection box.
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Z Location Any SLC device has a Z location in meters (longitudinal distance from some reference point). The reference point for the SLC system
is at the beginning of sector 1 (CID has negative numbers). For example, QUAD 111 (the first magnet in sector 1) has a Z position of
0.8000000 meters).
Z Per Hour See ZPH.
ZEUS an experiment conducted using the HERA collider.
ZFS Originally, Zettabyte File System. A Solaris file system that manages physical storage with storage pools.
ZGS Zero Gradient Synchrotron (Argonne).
ZPH Z Per Hour. A measurement of SLC luminosity, or Z production rate.
ZTIM Indicates the last time a magnet standardization was lost. A database secondary.
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